Quantum coherence and quantum correlations are of fundamental and practical significance
for the development of quantum mechanics. They are also cornerstones of quantum …

At the beginning of the previous century, Newtonian mechanics was advanced by two new
revolutionary theories, Quantum Mechanics (QM) and General Relativity (GR). Both theories …

Quantum metrology studies the ultimate limit of precision in estimating a physical quantity if
quantum strategies are exploited. Here we investigate the evolution of a two-level atom as a …

We investigate the ultimate estimation precision, characterized by the quantum Fisher
information, of a two-level atom as a detector which is coupled to massless scalar field in the …

A long-standing debate on Unruh effect is about its obscure thermal nature. In this Letter, we
use quantum Fisher information (QFI) as an effective probe to explore the thermal nature of …

We propose the use of a waveguidelike transmission line based on direct-current
superconducting quantum interference devices (dc-SQUID) and demonstrate that the node …

We study the quantum metrology for a pair of entangled Unruh-Dewitt detectors when one of
them is accelerated and coupled to a massless scalar field. Comparing with previous …

A bstract Relativistic quantum metrology studies the maximal achievable precision for
estimating a physical quantity when both quantum and relativistic effects are taken into …

We address the issue of precisely estimating small parameters encoded in a general linear
transformation of the modes of a bosonic quantum field. Such Bogoliubov transformations …

We study the distribution of quantum entanglement for continuous variables among causally
disconnected open charts in de Sitter space. It is found that genuine tripartite entanglement …